题目内容
(1)求定积分∫02πsinxdx;
(2)计算(
)16+
.
(2)计算(
1-i | ||
|
(1+2i)2 |
1-i |
(1)∫02πsinxdx=-cosx|0 2π=-cos2π-(-cos0)=-1-(-1)=0
(2)(
)16+
=[(
)2]8+
=(-i)8+
=1+
=-
+
i
(2)(
1-i | ||
|
(1+2i)2 |
1-i |
1-i | ||
|
-3+4i |
1-i |
(-3+4i)(1+i) |
(1-i)(1+i) |
-7+i |
2 |
5 |
2 |
1 |
2 |
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